2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/199517We performed the first direct calculation of the probability of pionium (pi+pi- atom) ionization in the target. The dependence of the probability of pionium ionization in the target as a function of the pionium lifetime is established. These calculations are of interest of the DIRAC experiment at CERN, which aims to measure the pionium lifetime with high precision.11 pages, 4 figures; submitted to "Physics of Atomic Nuclei" ("Yadernaya Fizika")High Energy Physics - Phenomenologytext